Investigators released an image of the man which was captured on surveillance video.
He allegedly robbed the First Cornerstone Bank on Schuylkill East Road on Friday morning.
Police say he gave the teller a note and left with an undisclosed amount of cash.
He's described as about 5 feet 6 inches tall with a full tattoo sleeve on his left arm.
Anyone with information is asked to contact East Pikeland Police at 610-935-0606.